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Saw Core Precision VCO
This uses a vca based exponential converter with a Jupiter influenced VCO circuit. This is not a clone. I used modern surface mount parts. There are no obsolete parts found on this.
http://www.bluelanternstore.com/store/p42/JFET_Saw_core_VCO_-Clearance_Sale_White_FACEPLATE..html
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These merchants probably sell this module. Huh?